This computation involved: DETAILS NEEDED - COMPUTATION CREATED FOR SATELLITE COMPOSITE. deployed on European Remote Sensing satellite (ERS-1). European Remote Sensing satellite, ERS-1, launched in 1991, was ESA's first Earth Observation satellite (polar orbiting); it carried a comprehensive payload including an imaging Synthetic Aperture Radar (SAR), a radar altimeter and other powerful instruments to measure ocean surface temperature and winds at sea. ERS-2, which overlapped with ERS-1, was launched in 1995 with an additional sensor for atmospheric ozone research. ERS 1 was taken out of action in 2000 after nine years of service.

<div property="cedacat:introduction">
<div class="introduction">Introduction</div>
<p>European Remote Sensing satellite, ERS-1, launched in 1991, was ESA's first Earth Observation satellite (polar orbiting); it carried a comprehensive payload including an imaging Active Microwave Instrument-Synthetic Aperture Radar (AMI-SAR), a radar altimeter and other powerful instruments to measure ocean surface temperature and winds at sea. ERS-2, which overlapped with ERS-1, was launched in 1995 with an additional sensor for atmospheric ozone research. ERS 1 was taken out of action in 2000 after nine years of service.</p>

<h3>Orbital Parameters</h3>
<table border="0">
<tbody>

<tr>
<th>Launch</th>
<td>1991-07-17</td>
</tr>

<tr>
<th>Orbit type</th>
<td>Polar, sun-synchronous</td>
</tr>

<tr>
<th>Orbital Period</th>
<td>100 minutes</td>
</tr>

<tr>
<th>Repeat Period</th>
<td>35 days</td>
</tr>

<tr>
<th>Altitude</th>
<td>782–785km</td>
</tr>

<tr>
<th>Inclination</th>
<td>98.5 degrees</td>
</tr>

</tbody>
</table>
</div>